My brother printer says that there is an error number 34and to check troubleshooter but i have lost manual it is a dcp-375cw

You can troubleshoot ink absorber nearly full of brother DCP-J125 printer by this pic:

For the more details and other error information and troubleshoot visit the link:
https://www.manualslib.com/manual/622268/Brother-Dcp-J125.html?page=94

Manuals DCP 1510 Australia Brother

User Guide Manuals DCP 1510 Australia Brother

why dcp j125 paper jam

Here's what the manual states in the troubleshooting section:


Unable to Change
Unable to Clean
Unable to Init
Unable to Print
Unable to Scan

The machine has a mechanical problem.
-OR-
A foreign obstacle such as a clip or ripped
paper is in the machine.
Open the scanner cover and remove
any foreign obstacles inside the
machine. If the error message
continues, disconnect the machine
from the power source for several
minutes then reconnect it.

Check the Brother website here:
http://welcome.solutions.brother.com/BSC/public/eu/gb/en/faq/faq/000000/000500/000065/faq000565_001.html?reg=eu&c=gb&lang=en&prod=dcp115c_eu_as&Cat=11

You may visit at : How to Fix Brother Printer Is Not Working Problem Down reporter and find the solution for printer related problems.

your yellow toner cartridge is not properly installed.Pull out the drum unit, take out the toner cartridge and put it back into the drum unit again

brother dcp-165c printer unable to clean , see troubleshooting and routine maintenance chapter in User's guide

There is no DCP-135C on Brother's website, but there is a 130C, which I suspect is simply a series number rather than a specific modle number. Check out this manual, see it is of any help.
http://www.brother-usa.com/ModelDocuments/Consumer/Users%20Manual/UM_DCP_130c_EN_294.PDF

www.brother.com has those user guides by model number..

What 2 digit error code does the machine display, too?